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Q: What can cause transfercase motor to fail over and over? on 2006 Buick Rainier

We purchased our vehicle and within 3 months the transfercase motor failed. We replaced the motor, drove 4 hours and it failed again.
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possible installers used wrong grade fluid. was this done at the dealership, general mech. shop or a tranny shop? if not done at a tranny shop i would suggest u try there next. they are specialized and will more thorough testing and trouble shooting methods than dealership or general mech. shop. bring it to a tranny shop for diagnostic run. tranny tech. will advise.
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